When did we start feeding cattle grain?

It was around the 1950's that feeding grain to cattle became popular. Prior to post war times no one had heard of 'grain feed cattle'. They were all raised on pastures. After the war a higher consumer demand forced farmers to find a way to fatten their cattle faster to get them ready for market. Pasture raised cattle take as long as three years to get ready for market. Grain fed cattle takes as little time as fifteen months.